Sofa



FIG. 1 is a front view of the design for a sofa;

FIG. 2 is a rear view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a right perspective view thereof;

FIG. 8 is a left perspective view thereof;

FIG. 9 is a right perspective view of the sofa in a partially reclined position;

FIG. 10 is a left perspective view of the sofa in a partially reclined position;

FIG. 11 is a right perspective view of the sofa in a fully reclined position; and,

FIG. 12 is a left perspective view of the sofa in a fully reclined position.

The broken line showing is included for the purpose of illustrating environment of the design and forms no part of the claimed design. 

The ornamental design for a sofa, as shown and described. 